Detachable Electrical Connection Box Grounding via Lock Portion
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Solution Overview
Problem
The existing electrical connection boxes for vehicles require redesign and remanufacturing every time there are changes in electric components or circuit bases, leading to high costs due to their integral structure.
Innovation Solution
The design of an electrical connection box with a detachable inner box and a common outer box, where the inner box can be customized according to specifications, and the outer box provides a ground connection through a ground member and contact conductor, allowing for separate design and manufacturing of the inner box without affecting the outer box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an integral structure with electric components and circuit bases is used, then the electrical connection box can be manufactured as a single unit, but the entire box must be redesigned and remanufactured every time specifications change, resulting in high costs
Solution Approach 1:
The electrical connection box is divided into an outer box and a detachable inner box. The outer box remains fixed while the inner box can be replaced independently when specifications change. This segmentation allows the commonly used outer box to be reused while only the inner box needs to be redesigned for different specifications, significantly reducing design and manufacturing costs.
2Reliability
If grounding conductors are connected by conductor wires or ground circuits in connectors, then ground connections can be established, but additional wires and complex circuits are required
Solution Approach 1:
The ground connection function is merged with the mechanical locking structure. The lock portion serves dual purposes: mechanically securing the inner box to the outer box and simultaneously establishing electrical ground connection through conductive lock portions. This eliminates the need for separate ground wires and ground circuits, simplifying the overall structure while maintaining reliable ground connection.
3Adaptability or versatility
If the entire electrical connection box is redesigned for every specification change, then the latest specifications can be accommodated, but design and manufacturing costs increase significantly
Solution Approach 1:
The electrical connection box is divided into an outer box and a detachable inner box. The outer box remains fixed while the inner box can be replaced independently when specifications change. This segmentation allows the commonly used outer box to be reused while only the inner box needs to be redesigned for different specifications, significantly reducing design and manufacturing costs.
Solution Approach 2:
The outer box is designed as a universal component that can accommodate different inner boxes with various specifications. The lock portion is designed to work with different inner box configurations while maintaining the same external interface and ground connection functionality, enabling the outer box to serve multiple purposes across different product variants.
Data Source
AI summary
An electrical connection box includes an outer box and an inner box to be accommodated in the outer box. The outer box includes an outer box body, a first lock portion to lock the inner box and a ground member to be electrically connected to a ground conductor, the ground member including a first ground contact portion provided at or adjacent to the first lock portion. The inner box includes an inner box body, a second lock portion to be engaged with the first lock portion, a ground circuit element to which the circuit base is connected to ground the circuit base and a contact conductor electrically connected to the ground circuit element, the contact conductor including a second ground contact portion to be electrically connected to the first ground contact portion when the first lock portion and the second lock portion are engaged with each other.